* enter the characters shown in the image. website policies help working hours contact us download ipr web information manager feedback visitor analytics website content managed by department of telecommunications, ministry of communication, goi designed, developed and hosted by national informatics...
including three aspherical elements, one super ed element and one ed element to effectively control spherical aberration, field curvature and chromatic aberration. this minimizes the negative effects of various forms of aberration, such as luminance shift and color bleeding, to deliver astonishing image...